•  
  •  
 

Document Type

General Interest Article

Publication Date

1933

Journal Title

Proceedings of the Iowa Academy of Science

Volume

40

Issue

1

First Page

25

Last Page

37

Copyright

©1933 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.